Description: Specifications BrandConvoyModelS21GLight Source519AColor Temperature3000K 4000K 5000K 5700KMaterialAluminum AlloyLens typeAR Coated Glass LensBattery Type1 21700 Lithium Battery Not Included SizeLength 124mm Diameter 26mmNet Weight77 2gGross Weight89 3gColorGrey Driver modes 12 groups 1 click the switch to turn the flashlight on off tap the switch to select mode2 if flashlight is turned on tap the switch 20 times quickly to enter into config mode On a visual interface as long as you click on an option it means that the option is selected The flashlight has no visual interface It flashes to represent an option and tap the switch in the flashing process means to select the option Option 1 normal flash 1 time buzz flash tap the switch to enter into sub option to select the mode group If the user has no operation the config mode will enter option 2 sub option 1 1 normal flash 1 time tap the switch to select mode group 1 0 1 1 10 35 100 strobe biking battery check sub option 1 2 normal flash 2 times tap the switch to select mode group 2 0 1 1 10 35 100 sub option 1 3 normal flash 3 times tap the switch to select mode group 3 100 35 10 1 0 1 sub option 1 4 normal flash 4 times tap the switch to select mode group 4 1 20 100 strobe biking battery check SOS sub option 1 5 normal flash 5 times tap the switch to select mode group 5 1 20 100